WO2014194814A1 - 一种提高换台速度的方法、装置及系统 - Google Patents

一种提高换台速度的方法、装置及系统 Download PDF

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Publication number
WO2014194814A1
WO2014194814A1 PCT/CN2014/079116 CN2014079116W WO2014194814A1 WO 2014194814 A1 WO2014194814 A1 WO 2014194814A1 CN 2014079116 W CN2014079116 W CN 2014079116W WO 2014194814 A1 WO2014194814 A1 WO 2014194814A1
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WIPO (PCT)
Prior art keywords
channel
information
audio
video
preset
Prior art date
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PCT/CN2014/079116
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English (en)
French (fr)
Inventor
黄威
Original Assignee
华为终端有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为终端有限公司 filed Critical 华为终端有限公司
Priority to EP14806858.8A priority Critical patent/EP2991361B1/en
Publication of WO2014194814A1 publication Critical patent/WO2014194814A1/zh
Priority to US14/955,529 priority patent/US20160088345A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4383Accessing a communication channel
    • H04N21/4384Accessing a communication channel involving operations to reduce the access time, e.g. fast-tuning for reducing channel switching latency
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4623Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4627Rights management associated to the content

Definitions

  • the present invention claims to be submitted to the Chinese Patent Office on June 07, 2013, and the application number is 201310225818. 9. The invention is entitled "A method, device and system for improving the speed of changing channels" The priority of the Chinese Patent Application, the entire contents of which is incorporated herein by reference.
  • TECHNICAL FIELD The present invention relates to the field of electronic terminal applications, and in particular, to a method, device and system for improving the speed of changing channels. BACKGROUND OF THE INVENTION With the increasing use of digital televisions, more and more programs are available to users, and the performance requirements for set-top boxes are becoming higher and higher. In the process of using a set-top box, changing channels is the most common operation, and the time spent changing channels will directly affect the user experience.
  • the operations performed during the channel change include: stopping the current broadcast program, locking the frequency of the target program, and receiving the PSI (English full name: Program Specific Information) table required for receiving the program playlist.
  • PSI Program Specific Information
  • CA English full name: Conditional Access, Chinese full name: conditional access
  • the prior art uses the time taken to shorten the buffering aspect of the frequency-locked and auxiliary data PSI table to improve the speed of the channel change. For example, optimizing the speed of the frequency-locked operation, buffering the PSI table data in the same frequency point, shortening the data waiting time of the PSI table in the same frequency point, and shortening the cross-over frequency by using the idle tuner to complete the frequency-locking operation of the adjacent channel.
  • the method, the device and the system for improving the speed of changing the platform provided by the embodiment of the invention save the time for changing the platform and improve the efficiency of the device.
  • a method for increasing the speed of changing channels including:
  • the first information includes: at least one of conditional access CA authentication information, adult level restriction information, and output port copyright control information corresponding to the preset channel;
  • the audio and video of the target channel is output according to the switching instruction and the first information, so that the multimedia playing device plays the audio and video of the target channel.
  • the preset channel includes a neighboring channel of a currently playing channel.
  • the method further includes: acquiring audio and video information of the preset channel;
  • the audio and video information of the preset channel is descrambled and buffered.
  • the method further includes:
  • the start position of the play is selected, and the start position indicates: the position closest to the current play time, which can be used for the start of the decoded image group.
  • the method further includes: decoding the audio and video information of the target channel, and outputting the decoded audio and video of the target channel.
  • an apparatus for increasing the speed of changing channels including:
  • An obtaining unit configured to acquire first information of a preset channel
  • the first information includes: at least one of conditional access CA authentication information, adult level restriction information, and output port copyright control information corresponding to the preset channel;
  • a receiving unit configured to receive a switching instruction input by the user, where the switching instruction indicates switching to a target channel
  • an output unit configured to: when determining that the target channel is included in the preset channel, according to the receiving unit And the switching instruction and the first information acquired by the acquiring unit, output audio and video of the target channel, so that the multimedia playing device plays the audio and video of the target channel.
  • the method further includes:
  • the acquiring unit is further configured to acquire audio and video information of the preset channel
  • the output unit includes:
  • a sub-unit is selected for selecting a starting position for playing, the starting position indicating: a position closest to the current playing time, which can be used for the start of the decoded image group.
  • the processing unit is further configured to: decode audio and video information of the target channel in the audio and video information of the preset channel acquired by the acquiring unit;
  • the output unit is specifically configured to output audio and video of the target channel decoded by the processing unit.
  • a system for improving the speed of changing channels characterized in that the system comprises the device for increasing the speed of changing channels according to any one of the preceding claims 6 to 10, and the multimedia playing device, the multimedia The playback device plays the audio and video output by the device that increases the speed of the channel change.
  • the method, device and system for improving the switching speed acquire the CA authentication information, the adult-level restriction information, the output port copyright control information of the preset channel, and before receiving the switching instruction input by the user,
  • the audio and video information of the preset channel is descrambled and buffered.
  • the audio and video information of the target channel is decoded and output.
  • the prior art only increases the speed of the channel change by shortening a small part of the time during the channel change process, and the embodiment of the present invention takes time for the channel change process. The long process further shortens the channel change time and makes the channel change speed significantly higher.
  • FIG. 1 is a schematic diagram of a flow of a channel change operation according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for improving a channel change speed according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a method for buffering according to another embodiment of the present invention.
  • FIG. 4 is a flowchart of a method for playing a phase according to another embodiment of the present invention.
  • the present invention provides a method for improving the speed of changing channels, which overcomes the shortcomings of CA authentication, adult level limitation, and excessively long decoding time during audio and video playback.
  • the specific implementation manner is as follows: When the current program is played, the audio and video information of the preset channel can be recorded to the buffer in advance, so that when the instruction sent by the user is switched to the switching instruction of the preset channel, the direct acquisition has been stored. And/or the first information of the buffered preset channel and the audio and video information, and then the playback instruction indicates the program to be played. This makes it possible to ensure that the program play of the target channel is in the ready state in the background before receiving the switching instruction indicating the switch to the preset channel, so that the channel change speed can be significantly improved.
  • the preset channel includes a neighboring channel of the currently played channel.
  • the adjacent channel refers to a channel adjacent to the logical channel number of the current playing channel, generally two channels, for example, the channel numbering sequence is Nl, N2, N3, N4, ..., the current playing channel is N2, and the channel adjacent to N2 For N1 and N3.
  • the user presses the up and down keys to change channels, which is the most commonly used channel changing method, and the adjacent channel is the channel indicated by the up and down keys of the currently playing channel. The behavior of using the digital key to switch directly from the Ding user is unpredictable.
  • the target channel indicated by the switching instruction is uncertain, so in order to save storage space and improve the working efficiency of the device, it is not necessary to All channels are assigned to the preset channel.
  • the preset channel is preferably a neighboring channel, and the adjacent channel is two channels adjacent to the current playing channel logical channel number.
  • the audio and video information to be played will be unconditionally buffered, and the adult-level restriction information and output are recorded.
  • the port copyright control information is processed after the user issues a switching instruction to switch to the preset channel, and the aforementioned adult-level restriction information and output port copyright control information are all processed during playback.
  • the switching operation includes the following processes: changing the operation response, stopping the current playing program, CA authentication/descrambling, adult/output port copyright limitation, audio and video decoding, audio and video output control, wherein, stopping the current
  • the broadcast program includes: frequency lock and reception PSI table.
  • the above process is represented on the time axis, and the switching operation response, frequency locking, receiving PSI table, CA authentication/descrambling, adult/output port copyright limitation, audio and video information decoding, and sound are set.
  • the video output control is represented by T1, ⁇ 2 - ⁇ 7, respectively, and ⁇ 8 is the audio and video information of the current program.
  • the time value consumed by each process in the process of changing channels can be known.
  • the ⁇ 2 and ⁇ 3 times shown in FIG. 1 involve the buffering time of the lock frequency and the auxiliary data PSI table, which is about 0.
  • ⁇ 8 indicates a minimum played image group, if ⁇ 8 is behind If a group of images has not been received yet, then the group of images in the range of ⁇ 8 is the image group (sequence) that can be used to decode the output closest to the current time.
  • An embodiment of the present invention provides a method for improving the speed of changing channels. As shown in FIG. 2, the method includes:
  • the first information includes at least one of the CA authentication information, the adult-level restriction information, and the output port copyright control information corresponding to the preset channel, and further includes any one or more of the information according to the actual situation.
  • the preset channel is a neighboring channel of the currently playing channel.
  • the adjacent channel refers to two channels adjacent to the current playback channel logical channel number. Among them, the logical channel number is used to sort the channels.
  • the switching instruction indicates switching to the target channel.
  • the preset channel mentioned in 201 when it is determined that the target channel is included in the preset channel, performs the following 203.
  • the switching instruction includes the logical channel number of the target channel, and in combination with the description of the preset channel, that is, the preset channel is two channels adjacent to the logical channel number of the current playing channel, the The logical channel number of the preset channel. Then, the logical channel number of the target channel is compared with the logical channel number of the preset channel. If there is the same part, it is determined that the target channel is included in the preset channel.
  • the method further includes acquiring audio and video information of the preset channel, where the audio and video information is the media data of the preset channel, and the audio and video information can be simplified and described as audio and video.
  • the audio and video information of the preset channel is obtained before the first information is acquired.
  • the audio and video information of the preset channel is descrambled and buffered according to the first information.
  • the target channel indicated by the received switching instruction is included in the preset channel, decoding the audio and video information of the target channel, and then outputting the decoded video of the target channel, the process will be detailed in the following embodiment. Description.
  • the audio and video of the target channel indicated by the first information output switching instruction obtained by the foregoing 201 includes: determining, according to the acquired CA authentication information, whether a CA authentication error occurs; when determining that there is no CA authentication error or After the CA authentication error is released, detecting whether the preset channel program indicated by the switching instruction is restricted by the adult level; when it is determined that it is not restricted by the adult level or the adult level, acquiring the buffered audio and video information; and determining the starting of the playing The position is further determined whether the copyright of the output port of the audio and video information is controlled. When the copyright of the output port is not controlled or controlled, the audio and video information is decoded and output, thereby realizing audio and video playback. It should be noted that the above process of outputting audio and video according to the switching instruction and the first information will be 401-405 in the next embodiment. Detailed description of the line.
  • the starting position of the playing is selected, where the starting position represents: the position closest to the current playing time, which can be used for decoding the start of the image group, that is, the above FIG. 1 The location of the T8.
  • the method for improving the switching speed acquires CA authentication information, adult-level restriction information, output port copyright control information of a preset channel, and preset channel information, before receiving a switching instruction input by a user.
  • the audio and video information is descrambled and buffered.
  • the target channel indicated by the received switching instruction is included in the preset channel, the audio and video information of the target channel is decoded and output.
  • the prior art can only improve the speed of the channel change by shortening a small part of the time during the channel change process.
  • the technical solution of the present invention further shortens the channel change time for the long-time process in the channel change process during the channel change process. , making the channel change speed significantly improved.
  • the method includes two stages of buffering and playing. As shown in FIG. 3, the buffering stage includes:
  • the preset channel is the same as the related content described in the previous embodiment 201, and the description is not repeated here. 302. Determine whether the frequency point where the preset channel is located is locked.
  • the idle tuner resource is applied to the tuner resource management module, where the tuner resource management module is a function module responsible for solving the high frequency head resource conflict, and the idle tuner resource is used to lock the preset channel. Frequency point.
  • the 305 receives and filters the audio and video information of the preset channel, and buffers the audio and video information of the program of the preset channel to the local. This step may also be referred to as a time shift buffering process of the preset channel program. .
  • the obtained CA authentication information may include the following two situations:
  • the obtained CA authentication information is information when the CA authentication fails
  • the second case The obtained CA authentication information is information that the CA authentication succeeds.
  • the present embodiment is described by taking the second case as an example.
  • the program to be buffered is restricted by the adult level, that is, the program to be buffered cannot be played immediately.
  • the program to be buffered is continuously buffered, and the adult-level restriction information is recorded, thereby obtaining the adult-level restriction information; when it is determined that the program to be buffered is not restricted by the adult level, the execution is performed. The following 308.
  • the output port copyright control information of the program may be monitored while listening to the adult-level restriction information of the program to be buffered.
  • the output port copyright control information is saved, that is, the output port copyright control information of the channel is obtained, and the port control information is output for subsequent playback; when it is determined that the copyright of the output port is not When it is controlled, perform the following 309.
  • the obtained output port copyright control information may also be information when it is determined that the copyright of the output port is not controlled.
  • description is made by taking as an example the determination that the copyright of the output port is controlled.
  • the descrambling of the audio and video information of the preset channel is completed by the conditional access management module.
  • CA scrambling refers to disturbing the code stream of audio and video information, mainly by calculating part of the data in the code stream, thereby disturbing the original order. If the descrambling is not performed according to a predetermined protocol, then Audio and video information cannot be output correctly. CA descrambling is a reverse process as opposed to CA scrambling.
  • the audio and video information storing the preset channel refers to a buffering process of the audio and video information after the CA is descrambled.
  • the above-mentioned 301-310 corresponds to the buffering phase of the preset channel, which is the first information of the preset channel, including: CA authentication information, at this stage, before the current channel program is played, and the user's switching instruction is not received.
  • the adult-level restriction information and the output port copyright control information are first cached.
  • the target channel indicated by the received switching instruction is included in the preset channel, the first information of the cached target channel can be directly obtained, so that it is not necessary to receive After the switching instruction input by the user, the first information is obtained, thereby saving a lot of time, and when switching to the preset channel, the working efficiency of the device is improved.
  • the current playing program After executing the above 310, after receiving the switching instruction input by the user, the current playing program is stopped first, and then enters the playing phase. Before entering the playing phase, it is required to determine whether the target channel indicated by the switching instruction is included in the preset channel, that is, whether the target channel has started time shift buffering. According to the buffering stage, the first information of the preset channel and the audio and video information are Already cached, when it is determined that the target channel has been activated, the subsequent playback process is performed. It should be noted that, after the audio and video information of the preset channel program is received and filtered in combination with the description of the above 305, it indicates that the preset channel has started time shift buffering. As shown in Figure 4, the playback phase includes:
  • a letter such as an error type of the record of the above 306 is displayed on the user interface.
  • the user interface is submitted to prompt the user to input a password. After the user enters the correct password, the following 403 can be performed. If the password is incorrect, return to the password prompt page until the correct password is received or New switching instructions. 403. Acquire audio and video information buffered by the foregoing cache phase.
  • the image group (sequence) available for decoding closest to the current playing time is firstly located according to the video data, and then the audio and video information after the position is filtered.
  • the image group (sequence) available for decoding closest to the current playing time is the same as the related content described in the above 203, and the description thereof will not be repeated here.
  • the output port is controlled, that is, whether there is an output port copyright protection requirement.
  • the protection of the SD output port can be directly set. If the HD output is checked, the port protection protocol negotiation is successful. If the interface is unsuccessful, the user interface is notified that the TV is incompatible. The playback enters the error waiting state. After the fault is cleared, the following 405 is executed. .
  • the output port is a high-definition output port; when it is determined that it is a high-definition output port, it is determined whether the port protection protocol is successfully negotiated; when the protection protocol negotiation is successful, setting the control state of the output port copyright; when determining the protection protocol negotiation If it is unsuccessful, the situation needs to be reported to the user interface, and the TV is incompatible, and then enters the wait error recovery state, and then waits for the error recovery to perform the output port copyright control state setting and the following 405.
  • the copyright control state of the output port can be directly set, and then the following 405 is performed.
  • the decoder can complete two or more video decodings at the same time, that is, the set top box includes multiple decoders
  • the audio and video information of the adjacent channel can be directly decoded into the buffer, and the designated channel is directly displayed when the switching instruction is received.
  • the content of the seamless transition is not limited to, the decoder, the set top box includes multiple decoders
  • the non-volatile storage medium is used as a buffer, and the storage medium can cache audio and video information for several hours.
  • the user can immediately view the media content that has been buffered before, instead of only returning Look at the contents of the buffer after the switch.
  • the audio and video jitter and pause problems just entering the time shift state from the live broadcast no longer exist.
  • the working principle of time shifting is to buffer the data of the currently playing program to the hard disk, and the user can switch from the live broadcast state to the time shift mode to play back the program that has just been broadcasted by using the return button, for example, repeatedly enjoying the goal of the soccer match. .
  • time-shifted data buffer Since the time-shifted data buffer is started after the channel switching, it takes a while after the channel-changing operation to enter the time-shift mode by looking back, and can only look back at the content that the user has already seen, and enters from the live broadcast. In the time-shifted state, audio and video may experience jitter or pause.
  • the method for improving the channel changing speed provided by the embodiment of the present invention, by recording the audio and video information of the preset channel to the buffer in advance when playing the current program, so that the switching instruction indicating that the user input is received indicates the target to be switched to
  • the audio and video information of the target channel that has been cached is directly obtained. This allows the program playback of the target channel to be in the ready state in the background before receiving the switching instruction, thereby significantly increasing the switching speed.
  • the method for improving the switching speed provided by the embodiment of the present invention is applied to a set top box.
  • the tuner resource in the set top box is used for frequency locking; the conditional access management module is used to obtain CA authentication information and CA descrambling; the demultiplexer is used to receive and filter the video channel of the preset channel; The audio and video signal is decoded to output the decoded audio and video information.
  • the set-top box has different models, and the number of high-frequency heads and decoders included is different.
  • a set-top box has a single-frequency single-decoder set-top box, a dual-high-frequency single-decoder set-top box, and a multi-frequency head single.
  • a decoder set top box or the like, wherein the multi-frequency head can indicate that the number of the high frequency heads is three or more.
  • the operation flow of the channel changing is divided into: frequency locking, demodulation, first demultiplexing , descrambling, buffering, secondary demultiplexing, decoding, and audio and video output.
  • the frequency of the locked frequency that is, the frequency of the locked channel
  • the demodulation is a operation that will be performed after the frequency is locked.
  • the demultiplexing corresponds to the process of filtering and receiving the audio and video information of the preset channel after the PSI information is acquired;
  • the descrambling is CA descrambling;
  • the descrambled audio and video information is buffered;
  • the secondary demultiplexing is to filter the buffered audio and video information, so as to decode the filtered audio and video information, and finally output the decoded audio and video information, that is, the above audio and video. Output stage.
  • Another embodiment of the present invention provides a method for increasing the speed of a station change, which method can be applied to a specific example.
  • the method is applied to a set top box of a three-frequency single decoder, for example, that the set top box can simultaneously lock three channels, and that there are currently three idle tuner resources.
  • the currently playing program is a program of logical channel number N2, and its adjacent channels are channels of logical channel numbers N1 and N3.
  • the set top box type is a three-frequency head single decoder, and it can be determined that the frequency points of the logical channel numbers N1, N2, and N3 can be locked.
  • the description is also performed by frequency locking, demodulation, first demultiplexing, descrambling, buffering, secondary demultiplexing, decoding, and audio and video output.
  • the process flow, and each logical channel number corresponds to a set of the above-mentioned processes.
  • the program of the N1 channel stops buffering, and the logical channel number is started to be N4.
  • the buffering of the program so that when the user changes the platform up and down, the speed of the switching can be significantly improved, and the efficiency of the set-top box is improved, thereby saving user time.
  • the device includes: an obtaining unit 71, a receiving unit 72, and an output unit 73.
  • the obtaining unit 71 is configured to acquire first information of the preset channel.
  • the first information includes at least one of conditional access CA authentication information, adult-level restriction information, and output port copyright control information corresponding to the preset channel, and may further include any one or more types according to actual conditions. information.
  • the preset channel refers to a neighboring channel of the currently playing channel.
  • the adjacent channel refers to two channels adjacent to the current playback channel logical channel number.
  • the user presses the up and down keys to change channels, which is the most commonly used method of changing channels. Since the user's channel change behavior through the numeric keys is unpredictable, that is to say, the target channel indicated by the switching instruction is uncertain in this case, in order to save storage space and improve the working efficiency of the device, it is not necessary to route all channels. Is the default channel.
  • the preset channel is a neighboring channel
  • the adjacent channel is two channels adjacent to the logical number of the current playing channel, that is, the adjacent channel is the channel indicated by the up and down keys of the current playing channel.
  • the receiving unit 72 is configured to receive a switching instruction input by the user.
  • the switching instruction indicates switching to the target channel.
  • the output unit 73 is configured to: when determining that the target channel is included in the preset channel, output the audio and video of the target channel according to the switching instruction received by the receiving unit 72 and the first information acquired by the acquiring unit 71, so that the multimedia playing device plays the target channel. Audio and video.
  • the apparatus further includes: a processing unit 74; an output unit 73, further comprising: a selecting subunit 731.
  • the processing unit 74 is configured to: after the acquiring unit 71 acquires the first information of the preset channel, perform descrambling and buffering processing on the audio and video signal of the preset channel, and further use the preset channel acquired by the acquiring unit 71.
  • the audio and video information of the target channel in the video signal is decoded.
  • Select subunit 731 which is used to select the starting position for playback.
  • the starting position indicates: the position closest to the current playing time, which can be used for the beginning of the decoded image group. Referring to the contents of FIG. 1 above, the initial position here is the same as the description corresponding to T8, and the description thereof will not be repeated here.
  • the output unit 73 is specifically configured to output audio and video of the target channel decoded by the processing unit 74.
  • the device for improving the channel change speed obtained by the embodiment of the present invention obtains the CA authentication information, the adult level restriction information, and the output port copyright control information of the preset channel before the receiving unit receives the switching instruction input by the user.
  • the processing unit performs descrambling and buffering processing on the audio and video information of the preset channel, and when the receiving unit receives the switching instruction indicating the preset channel, and the target channel indicated by the switching instruction is included in the preset channel, the processing unit targets the target The audio and video information of the channel is decoded, and the output unit outputs the audio and video of the decoded target channel.
  • the prior art can only increase the speed of the channel change by shortening a small part of the time during the channel change process.
  • the channel change time is further shortened during the channel change process, so that the channel change speed is significantly improved.
  • the embodiment of the present invention provides a device 08 for improving the speed of changing channels.
  • the device includes: a processor 01, a memory 02, a receiver 03, and a transmitter 04.
  • the processor 01 is configured to obtain the first information of the preset channel, and is further configured to: when determining that the target channel is included in the preset channel, output the audio and video of the target channel according to the first information and the switching instruction received by the receiver 03.
  • the memory 02 is configured to store the first information of the preset channel acquired by the processor 01, the switching instruction received by the receiver 03, and the audio and video of the target channel to be output.
  • the first information includes: at least one of conditional access CA authentication information, adult-level restriction information, and output port copyright control information corresponding to the preset channel, and may include any one or several types according to actual conditions. information.
  • the preset channel refers to the adjacent channel of the currently playing channel.
  • the adjacent channel refers to two channels adjacent to the logical channel number of the currently playing channel.
  • the processor 01 is further configured to acquire a preset channel; determine whether a frequency point where the preset channel is located is locked; apply for an idle tuner resource when the frequency point is not locked; and acquire an idle high frequency when the frequency point is not locked;
  • the processor 01 is further configured to acquire a preset channel; determine whether a frequency point where the preset channel is located is locked; apply for an idle tuner resource when the frequency point is not locked; and acquire an idle high frequency when the frequency point is not locked;
  • the PSI of the preset channel is obtained;
  • the audio and video information of the preset channel program is filtered; the CA authentication operation is applied for the program of the preset channel, and the CA authentication information is obtained;
  • the CA authentication succeeds, it is determined whether the program of the preset channel to be buffered is restricted by the adult level; when it is determined that the program of the preset channel is restricted by the adult level, the adult-level restriction information is acquired; when it is determined that the program is not restricted by the adult level, the pre-determination is determined
  • the receiver 03 is configured to receive a switching instruction input by a user.
  • the switching instruction indicates switching to the target channel.
  • the processor 01 is further configured to: after obtaining the first information of the preset channel, and after the copyright of the preset channel output is not controlled, descrambling and buffering the audio and video information of the preset channel After receiving the switching instruction, the receiver 03 determines whether the target channel is included in the preset channel, and when determining that the target channel is included in the preset channel, plays the audio and video according to the switching instruction and the first information; The starting position of the playback.
  • the starting position indicates: the position closest to the current playing time, which can be used for the beginning of the decoded image group.
  • the processor 01 is further configured to determine whether a CA authentication error occurs; when it is determined that there is no CA authentication error or after the CA authentication error is removed, determining whether the preset channel program is restricted by the adult level; When the adult level is restricted, the user is prompted to enter a password, and the user inputs the correct password to obtain the cached audio and video information; determines whether the output port copyright is controlled, and when it is determined that the output port copyright is not controlled or the output port copyright control is released, the acquired The descrambled audio and video information is decoded and output, and enters the playing state.
  • the transmitter 04 is configured to send CA authentication error information and adult-level restricted information to the user interface, and send the audio and video of the target channel decoded by the processor 01 to the multimedia playback device.
  • the receiver 03 is further configured to receive a password input by the user according to the prompt of the processor 01.
  • the memory 02 is configured to store the audio and video information descrambled by the processor 01; the switching instruction of the user input received by the receiver 03; the starting position of the selected play; the password input by the user.
  • the device for improving the speed of changing the channel provided by the embodiment of the present invention, the processor acquiring the CA authentication information of the preset channel, The human-level restriction information, the output port copyright control information, and the descrambling and buffering processing of the audio and video information of the preset channel, receiving a switching instruction indicating the preset channel at the receiver, and determining that the target channel indicated by the switching instruction includes
  • the processor decodes the audio and video information of the target channel according to the first information, and the transmitter transmits the decoded audio and video information to the multimedia playing device.
  • the prior art can only improve the speed of changing the station by shortening the time during the channel changing process.
  • the technical solution of the present invention further shortens the channel changing time during the channel changing process, so that the channel changing speed is significantly improved.
  • the embodiment of the present invention further provides a system for improving the speed of changing channels.
  • the system includes a device 07 for improving the speed of changing channels, a multimedia playing device 01, or a device for improving the speed of changing channels, and a multimedia playing device 01. .
  • Fig. 10 shows an example of a system for increasing the speed of changing channels, and a system for increasing the speed of changing channels formed by the media playing device 01.
  • the system and the figure for increasing the switching speed of the device 08 and the multimedia playing device 01 for improving the switching speed are shown.
  • the device 07 for increasing the speed of changing the station includes the above units 71 to 74; the device 08 for increasing the speed of changing the station, including the listed processor 01, the memory 02, the receiver 03, and the transmitter 04; and the multimedia playing device 01 for receiving and changing
  • the device of the speed output outputs the audio and video of the target channel, and plays the audio and video.
  • the multimedia playback device 01 includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, and the like.
  • the present invention can be implemented by means of software plus necessary general hardware, and of course, by hardware, but in many cases, the former is a better implementation. .
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer.
  • a hard disk or optical disk or the like includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

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Abstract

本发明公开了一种提高换台速度的方法、装置及系统,涉及电子终端应用领域,进一步节省了换台时间,使得换台速度显著提高。本发明的具体实施例包括:在接收用户输入的切换指令之前,获取预设频道的第一信息,并对预设频道的音视频信息进行缓冲;在接收到指示切换到该预设频道的切换指令,且该切换指令指示的目标频道包含于预设频道时,使得目标频道的节目播放已经处于就绪状态,这样就节省了大量时间,从而能够显著提高换台速度。本发明技术方案主要应用于换台流程中。

Description

一种提高换台速度的方法、 装置及系统 本申请要求于 2013年 06月 07日提交中国专利局、 申请号为 201310225818. 9、 发 明名称为 "一种提高换台速度的方法、 装置及系统"的中国专利申请的优先权, 其全部 内容通过引用结合在本申请中。 技术领域 本发明涉及电子终端应用领域, 尤其涉及一种提高换台速度的方法、 装置及系统。 背景技术 随着数字电视日渐普遍地使用, 用户能够收看的节目越来越多, 从而对机顶盒的性 能要求也越来越高。 在使用机顶盒的过程中, 换台是最常用的操作, 而换台时耗费的时 间将直接影响用户的体验。 其中, 换台时进行的操作包括: 停止当前播放节目、 锁定目 标节目所在频点、 接收节目播放列表所需的 PSI (英文全称为: Program Specific Information, 中文全称为: 节目专有信息)表、 CA (英文全称为: Conditional Access, 中文全称为: 条件访问) 鉴权 /解扰、 成人级 /输出端口版权控制、 音视频解码及音视频 输出控制等一系列过程, 这些过程都是需要耗时的, 这就导致用户需要等待较长时间, 才能完成换台, 从而需要我们提高换台的速度, 以节省用户时间。
针对上述问题,现有技术采用缩短了锁频和辅助性数据 PSI表的缓冲方面所花费的 时间, 来提高换台的速度。 例如, 优化锁频操作的速度, 缓冲同频点内的 PSI表数据, 缩短同频点内切台时 PSI表数据等待时间,利用空闲高频头完成邻近频道的锁频操作来 缩短跨频点换台时的锁频时间等。
在实现上述方案的过程中, 发明人发现现有技术至少存在如下问题, 对于上述换台 操作的流程中,锁频和辅助性数据 PSI表的缓冲方面所花费的时间在换台操作流程中所 占比例小, 也就是说现有技术对换台速度的改善非常有限, 设备的效率依然很低。 发明内容
本发明的实施例提供的一种提高换台速度的方法、装置及系统,节省了换台的时间, 提高了设备效率。
为达到上述目的, 本发明的实施例采用如下技术方案:
第一方面, 提供了一种提高换台速度的方法, 包括:
获取预设频道的第一信息;
其中, 所述第一信息至少包括: 与所述预设频道对应的条件访问 CA鉴权信息、 成 人级限制信息、 输出端口版权控制信息中的一种;
接收用户输入的切换指令, 所述切换指令指示切换到目标频道;
当确定所述目标频道包含于所述预设频道时, 根据所述切换指令和所述第一信息, 输出所述目标频道的音视频, 以使得多媒体播放设备播放所述目标频道的音视频。
在第一方面的第一种可能实现方式中, 所述预设频道包括当前播放频道的邻近频 道。 结合第一方面、 第一方面的第一种可能实现方式, 在第一方面的第二种可能实现方 式中, 还包括: 获取所述预设频道的音视频信息;
在获取所述预设频道的第一信息之后, 对所述预设频道的音视频信息进行解扰、 缓 冲处理。
结合第一方面、第一方面的第一种可能实现方式、第一方面的第二种可能实现方式, 在第一方面的第三种可能实现方式中, 还包括:
选择播放的起始位置, 所述起始位置表示: 距离当前播放时间最近的, 可用于解码 的图像组开始的位置。
结合第一方面、第一方面的第一种可能实现方式、第一方面的第二种可能实现方式、 第一方面的第三种可能实现方式, 在第一方面的第四种可能实现方式中, 还包括: 对目标频道的音视频信息进行解码, 并输出解码后的所述目标频道的音视频。 第二方面, 提供了一种提高换台速度的装置, 包括:
获取单元, 用于获取预设频道的第一信息;
其中, 所述第一信息至少包括: 与所述预设频道对应的条件访问 CA鉴权信息、 成 人级限制信息、 输出端口版权控制信息中的一种;
接收单元, 用于接收用户输入的切换指令, 所述切换指令指示切换到目标频道; 输出单元, 用于当确定所述目标频道包含于所述预设频道时, 根据所述接收单元接 收的所述切换指令和所述获取单元获取的所述第一信息, 输出所述目标频道的音视频, 以使的多媒体播放设备播放所述目标频道的音视频。
在第二方面的第一种可能实现方式中, 所述预设频道包括当前播放频道的邻近频 道。
结合第二方面、 第二方面的第一种可能实现方式, 在第二方面的第二种可能实现方 式中, 还包括:
所述获取单元, 还用于获取所述预设频道的音视频信息;
处理单元, 用于在所述获取单元获取所述预设频道的第一信息之后, 对所述预设频 道的音视频信息进行解扰、 缓冲处理。
结合第二方面、第二方面的第一种可能实现方式、第二方面的第二种可能实现方式, 在第二方面的第三种可能实现方式中, 所述输出单元, 包括:
选择子单元, 用于选择播放的起始位置, 所述起始位置表示: 距离当前播放时间最 近的, 可用于解码的图像组开始的位置。
结合第二方面、第二方面的第一种可能实现方式、第二方面的第二种可能实现方式、 第二方面的第三种可能实现方式, 在第二方面的第四种可能实现方式中, 还包括: 所述处理单元,还用于对所述获取单元获取到的预设频道的音视频信息中的目标频 道的音视频信息进行解码;
所述输出单元, 具体用于输出所述处理单元解码后的所述目标频道的音视频。 第三方面, 提供了一种提高换台速度的系统, 其特征在于, 所述系统包括如上述权 利要求 6至 10任意一项所述的提高换台速度的装置以及多媒体播放设备, 所述多媒体 播放设备用丁 ·播放所述提高换台速度的装置输出的音视频。
本发明实施例提供的提高换台速度的方法、 装置及系统, 在接收到用户输入的切换 指令之前, 获取预设频道的 CA鉴权信息、 成人级限制信息、 输出端口版权控制信息, 并 对预设频道的音视频信息进行解扰、 缓冲处理, 在接收到的切换指令指示的目标频道包 含于预设频道时, 对该目标频道的音视频信息进行解码、 输出。 而现有技术只通过缩短 换台过程中很小的一部分时间, 来提高换台速度, 本发明实施例, 针对换台过程中耗时 长的流程, 进一步缩短了换台时间, 使得换台速度显著提高。 附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对实施例或现有 技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是本 发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还 可以根据这些附图获得其他的附图。
图 1为本发明实施例提供的一种换台操作流程的示意图;
图 2为本发明一实施例提供的一种提高换台速度的方法流程图;
图 3为本发明另一实施例提供的一种缓冲阶段的方法流程图;
图 4为本发明另一实施例提供的一种播放阶段的方法流程图;
图 5为本发明另一实施例提供的一种机顶盒进行换台操作的原理示意图; 图 6为本发明另一实施例提供的另一种机顶盒进行换台操作的原理示意图; 图 7为本发明另一实施例提供的一种提高换台速度装置的组成示意图;
图 8为本发明另一实施例提供的另一种提高换台速度装置的组成示意图; 图 9为本发明另一实施例提供的另一种提高换台速度装置的组成示意图; 图 10为本发明另一实施例提供的一种提高换台速度系统的组成示意图。 具体实施方式 下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整 地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是全部的实施例。 基 于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有 其他实施例, 都属于本发明保护的范围。
本发明提供一种了提高换台速度的方法, 克服了 CA鉴权、 成人级限制和音视频播 放时解码耗时过长的缺陷。 具体实现方式为: 在播放当前节目时, 预设频道的音视频信 息可以提前录制到缓冲区,这样就使得在接收到用户发出的指示切换到预设频道的切换 指令时, 直接获取已经存储和 /或缓冲的预设频道的第一信息和音视频信息, 进而播放 切换指令指示播放的节目。 这就使得在接收到指示切换到预设频道的切换指令之前, 就 在后台保证目标频道的节目播放处于就绪状态, 从而能够显著提升换台速度。
本发明实施例中, 预设频道包括当前播放频道的邻近频道。 邻近频道指与当前播放 频道逻辑频道号相邻的频道,一般为两个频道,例如,频道编号顺序为 Nl, N2,N3, N4……, 当前播放频道为 N2, 则与 N2相邻的频道为 N1和 N3。 在实际应用过程中, 用户按上下 键换台, 是最常使用的换台方法, 则邻近频道即当前播放频道的上下键所指示的频道。 由丁 ·用户直接使用数字键换台的行为是不可预测的, 也就是说, 这种情况下切换指令指 示的目标频道是不确定的, 那么为节省存储空间、 提升设备的工作效率, 不必将所有的 频道划入预设频道。 则在本发明实施例中, 优选预设频道为邻近频道, 且邻近频道为与 当前播放频道逻辑频道号相邻的两个频道。
进一步的, 为确保邻近频道的缓冲总是能够正常进行, 缓冲过程中, 除去资源获取 失败和 CA鉴权错误的情况外, 将无条件缓冲待播放的音视频信息, 并记录成人级限制信 息及输出端口版权控制信息, 待用户发出指示切换到预设频道的切换指令后再统一处 理, 即将前面提到的成人级限制信息和输出端口版权控制信息都在播放时处理。 可选的, 换台操作换包括如下流程: 换台操作反应、 停止当前播放节目、 CA鉴权 / 解扰、 成人级 /输出端口版权限制、 音视频解码、 音视频输出控制, 其中, 停止当前播 放节目包括: 锁频和接收 PSI表。 如图 1所示, 将上述流程在时间轴上表示, 且设换台 操作反应、 锁频、 接收 PSI表、 CA鉴权 /解扰、 成人级 /输出端口版权限制、 音视频信息 解码、 音视频输出控制分别由 Tl、 Τ2—Τ7表示, 且设 Τ8为当前节目的音视频信息。 具 体的, 在实际应用过程中, 可获知换台过程中各流程耗费的时间值, 例如, 图 1所示 Τ2 和 Τ3时间涉及锁频和辅助性数据 PSI表的缓冲耗时, 大约为 0. 5秒, 而现有技术对换 台过程最耗时的 Τ4表示的 CA鉴权 /解扰、 Τ5表示的成人级 /输出端口版权控制和 Τ6表 示的音视频解码过程没有改善, 并且这几项操作所需的时间在 1. 5秒以上。
值得说明的是, 为了最快速度解码已缓冲的指定频道的音视频数据, 并控制播放造 成的滞后感, 在目标频道启动播放时, 首先要确定播放的起始位置, 并且使用离当前播 放时间最近的可用于解码输出的图像组(序列)作为该起始位置,来启动目标节目播放。 结合附图 1的描述, 对上述 "离当前播放时间最近的可用于解码输出的图像组(序列)" 的具体解释为: 在图 1中, Τ8表示一个最小的播放的图像组, 如果 Τ8后面的一个图像 组还没有接收完, 那么 Τ8范围内的图像组就是这里所说 "离当前时间最近的可用于解 码输出的图像组 (序列)"。
本发明一实施例提供了一种提高换台速度的方法, 如图 2所示, 该方法包括:
201、 获取预设频道的第一信息。
其中, 第一信息至少包括: 与预设频道对应的 CA鉴权信息、 成人级限制信息、 输 出端口版权控制信息中的一种, 根据实际情况还包括其余任意一种或几种信息。
优选的, 预设频道为当前播放频道的邻近频道。 且邻近频道指与当前播放频道逻辑 频道号相邻的两个频道。 其中, 逻辑频道号用于为频道排序。
202、 接收用户输入的切换指令。
其中, 切换指令指示切换到目标频道。
可选的, 在接收到该切换指令之后, 判断切换指令指示的目标频道是否包含于上述
201提到的预设频道, 当确定目标频道包含于预设频道时, 执行下述 203。
值得说明的是, 该切换指令中包含目标频道的逻辑频道号, 结合上述对预设频道的 描述, 即预设频道为与当前播放频道逻辑频道号相邻的两个频道, 则可以获取到该预设 频道的逻辑频道号。 进而比较目标频道的逻辑频道号与该预设频道的逻辑频道号, 如果 有相同部分, 则确定该目标频道包含于预设频道。
203、 根据切换指令和第一信息, 输出目标频道的音视频, 以使得多媒体播放设备 播放目标频道的音视频。
可选的, 该方法还包括获取预设频道的音视频信息, 该音视频信息即为预设频道的 媒体数据, 且该音视频信息可简化描述为音视频。 优选的, 在获取该第一信息之前, 获 取预设频道的音视频信息。 进一步的, 在获取到预设频道的第一信息之后, 根据该第一 信息对该预设频道的音视频信息进行解扰、 缓冲处理。 并且在接收的切换指令指示的目 标频道包含于上述预设频道时, 对该目标频道的音视频信息进行解码, 继而输出解码后 的目标频道的咅视频, 该过程将在下 -实施例中加以详细说明。
具体的, 根据上述 201获取的第一信息输出切换指令指示的目标频道的音视频, 包 括: 根据获取到的 CA鉴权信息, 判断是否有 CA鉴权错误发生; 当确定无 CA鉴权错误 或 CA鉴权错误解除之后, 检测切换指令指示的预设频道节目是否受成人级限制; 当确 定其不受成人级限制或成人级限制解除时, 获取缓存的音视频信息; 并确定播放的起始 位置, 进而判断音视频信息的输出端口版权是否被控制, 当该输出端口版权不受控制或 控制解除后, 并对该音视频信息进行解码输出, 从而实现音视频播放。 值得说明的是, 上述的根据切换指令和第一信息, 输出音视频的流程, 将在下一实施例中 401— 405进 行详细说明。
可选的,在输出目标频道的音视频之前,要选择播放的起始位置,该起始位置表示: 距离当前播放时间最近的,可用于解码的图像组开始的位置,也就是指上述图 1中的 T8 的位置。
本发明实施例提供的提高换台速度的方法, 在接收到用户输入的切换指令之前, 获 取预设频道的 CA鉴权信息、 成人级限制信息、 输出端口版权控制信息, 并对预设频道 的音视频信息进行解扰、 缓冲处理, 在接收到的切换指令指示的目标频道包含于预设频 道时, 对该目标频道的音视频信息进行解码、 输出。 而现有技术只能通过缩短换台过程 中一小部分时间, 来提高换台速度, 本发明技术方案, 在换台过程中, 针对换台过程中 耗时长的流程, 进一步缩短了换台时间, 使得换台速度显著提高。
本发明另一实施例提供了一种提高换台速度的方法, 在具体实现过程中, 该方法包 括缓冲和播放两个阶段, 如图 3所示, 缓冲阶段包括:
301、 获取预设频道。
其中, 预设频道与上一实施例 201中描述的相关内容相同, 在此不再重复说明。 302、 判断预设频道所在的频点是否被锁定。
值得说明的是, 当预设频道所在的频点未被锁定时, 执行下述 303 ; 当预设频道所 在的频点已经锁定时, 执行下述 304。
303、 申请空闲的高频头资源。
进一步的, 当申请成功则时, 进行锁频; 当申请失败时, 进入等待错误恢复状态, 继而定期检查是否有高频头资源空闲, 待高频头获取成功后, 再继续锁定预设频道的频 点, 频点锁定成功后, 执行下述 304。 其中, 检查高频头资源是否空闲的周期可以是系 统或用户自行设定的。
优选的, 向高频头资源管理模块申请空闲高频头资源, 其中, 高频头资源管理模块 是负责高频头资源冲突的解决的功能模块, 空闲的高频头资源用于锁定预设频道的频 点。
304、 获取预设频道的 PSI。
305、 获取预设频道的音视频信息。
值得说明的是, 该 305即接收和过滤预设频道的音视频信息, 即将预设频道的节目 的音视频信息缓存到本地, 该步骤也可以被称为是预设频道节目的时移缓冲过程。
306、 为预设频道的节目申请 CA鉴权操作。
优选的, 向条件接收管理模块申请 CA鉴权操作。
进一步的, 如果 CA鉴权失败, 停止出错的缓冲通道, 并记录错误类型, 随即进入 等待错误恢复状态, 从而获取到 CA鉴权信息, 待 CA鉴权错误解除后再进行下述 307 ; 如果 CA鉴权成功, 则直接执行下述 307。
可选的, 获取的 CA鉴权信息可以包括以下两种情况:
第一种情况: 获取的 CA鉴权信息为 CA鉴权失败时的信息;
第二种情况: 获取的 CA鉴权信息为 CA鉴权成功的信息。
优选的, 本实施例以第二种情况为例, 进行描述; 此外, 值得说明的是, 当获取到 CA鉴权失败的信息时, 需要等到错误状态恢复后在执行下述操作。
307、 判断待缓冲的预设频道的节目是否被成人级限制。
其中, 待缓冲的节目被成人级限制, 即指待缓冲的节目不能立即播放。
优选的,通过监听待缓冲节目的成人级限制信息来判断待缓冲节目是否被成人级限 制。
进一步的, 当确定待缓冲节目被成人级限制时, 继续缓冲待缓冲节目, 并记录成人 级限制信息, 从而获取到成人级限制信息; 当确定待缓冲节目不被成人级限制时, 执行 下述 308。
可选的,获取到的成人级限制信息,还可以是待缓冲节目不被成人级限制时的信息。 本实施例以成人级限制信息为待缓冲节目被成人级限制时的信息为例进行描述。
308、 判断预设频道输出端口版权是否被控制。
具体的, 可以在监听上述待缓冲节目的成人级限制信息的同时, 监听该节目的输出 端口版权控制信息。
进一步的, 当判定输出端口的版权被控制时, 保存该输出端口版权控制信息, 即获 取到频道的输出端口版权控制信息, 用于后续播放时输出端口控制信息; 当判定该输出 端口的版权未被控制时, 执行下述 309。
可选的, 获取到的输出端口版权控制信息, 还可以是判定该输出端口的版权未被控 制时的信息。 在本实施例中以判定输出端口的版权被控制为例进行描述。
309、 对缓存的预设频道的音视频信息进行 CA解扰。
优选的, 对预设频道的音视频信息解扰通过条件接收管理模块完成。
值得说明的是, CA加扰是指对音视频信息的码流进行扰乱,主要是对码流中的部分 数据进行运算, 从而打乱原来的顺序, 如果不按照预定的协议进行解扰, 那么音视频信 息就不能正确的输出, CA解扰是与 CA加扰相对的反向流程。
310、 存储 CA解扰后的预设频道的音视频信息。
其中, 存储预设频道的音视频信息即指 CA解扰后的音视频信息的缓冲过程。
值得说明的是, 根据具体厂家的要求, CA解扰后的音视频信息需要经过二次加密, 但是这并不会影响解码播放的速度。 例如, Nagra CA要求所有录制节目都是二次加密, 以防止录制内容被复制。
上述 301— 310对应预设频道的缓冲阶段, 该阶段即为播放当前频道节目, 且未接收 到用户的切换指令之前, 在该阶段将预设频道的第一信息, 包括: CA鉴权信息、 成人级 限制信息以及输出端口版权控制信息先缓存起来,待到接收到的切换指令指示的目标频 道包含于预设频道时, 可以直接获取上述缓存的目标频道的第一信息, 这样就不必在接 收到用户输入的切换指令之后, 再去获取上述第一信息, 从而节省了大量时间, 在切换 到预设频道时, 提高了设备的工作效率。
在执行完上述 310, 接收到用户输入的切换指令之后, 先停止当前播放节目, 继而 进入播放阶段。 在进入播放阶段之前, 需要判断切换指令指示的目标频道是否包含于预 设频道, 即该目标频道是否已启动时移缓冲, 由上述缓冲阶段可知, 预设频道的第一信 息以及音视频信息都已经缓存, 当确定目标频道已启动时移缓冲时, 执行后续的播放流 程。 值得说明的是, 结合上述 305的描述, 接收和过滤预设频道节目的音视频信息之后, 就说明预设频道已启动时移缓冲。 如图 4所示, 播放阶段包括:
401、 判断是否有 CA鉴权错误发生。
具体的, 如果有 CA鉴权错误发生, 则在用户界面显示相应的授权错误信息, 当前播 放处于等待错误恢复状态, 待 CA鉴权错误解除后或者确定不存在 CA鉴权错误时, 再执行 下述 402。
优选的, 在本判断流程中, 结合上述 306的记录的错误类型等信怠显示在用户界面 上。
402、 判断预设频道节目是否受成人级限制。
优选的, 通过上述 307记录的成人级限制信息, 检查预设频道节目是否受成人级限 制。
具体的,如果受限则上报用户界面, 以提示用户输入密码,用户输入正确的密码后, 可执行下述 403, 如果输入密码不正确则回到输入密码提示页面, 直到接收到正确的密 码或新的切换指令。 403、 获取上述缓存阶段缓冲的音视频信息。
进一步的, 先根据视频数据定位到离当前播放时间最近的可用于解码的图像组(序 列) , 之后将该位置之后的音视频信息进行过滤。 其中, 离当前播放时间最近的可用于 解码的图像组 (序列) 与上述 203中描述的相关内容相同, 在此不再重复说明。
404、 判断输出端口版权是否被控制。
值得说明的是, 判断输出端口是否被控制, 即判断是否有输出端口版权保护要求。 其中, 标清输出端口的保护可以直接设置, 高清输出则要检查端口保护协议协商是否成 功,一不成功则上报用户界面提示电视不兼容, 播放进入错误等待状态, 待故障解除后再 执行下述 405。
具体的, 判断输出端口是否为高清输出端口; 当确定其为高清输出端口时, 判断该 端口保护协议是否协商成功; 当保护协议协商成功时, 设置输出端口版权的控制状态; 当确定保护协议协商未成功时, 需将该情况上报用户界面, 并显示电视不兼容, 继而进 入等待错误恢复状态, 待错误恢复再进行输出端口版权控制状态设置以及下述 405。 当 确定输出端口不为高清输出端口时, 可直接设置该输出端口的版权控制状态, 继而执行 下述 405。
405、 解码输出进入播放状态。
可选的, 如果解码器能同时完成两路及以上的视频解码, 即机顶盒包含多解码器, 那么邻近频道的音视频信息可以直接解码至缓冲区,待接收到切换指令时直接显示指定 的频道的内容, 达到无缝换台的效果。
优选的, 使用非易失性存储介质作为缓冲区, 该存储介质可以缓存的音视频信息长 达数小时, 用户在切换频道时, 可以立即回看之前已经缓冲的媒体内容, 而不是只能回 看换台之后缓冲的内容。 同时, 由于不存在直播到时移的切换过程, 刚从直播进入时移 状态时的音视频抖动及停顿问题也不复存在。 其中, 时移的工作原理是将当前播放节目 的数据缓冲到硬盘中,用户可以通过回看键从直播状态切换到时移模式回放刚刚已经播 出的节目, 例如, 反复欣赏足球比赛的进球。 由于时移数据缓冲是频道切换后才开始进 行的, 所以换台操作后要等一段时间才能通过回看操作进入到时移模式, 而且只能回看 用户已经看过的内容, 并且从直播进入时移状态时, 音视频会出现抖动或停顿的问题。
值得说明的是, 待切换到目标频道之后, 原来与该频道同时缓冲的另一邻近频道停 止缓冲,同时对目标频道的邻近频道进行新一轮的缓冲,即执行本实施例的上述 301-310 和 401-405。
本发明实施例提供的提高换台速度的方法, 通过在播放当前节目时, 将预设频道的 音视频信息提前录制到缓冲区,这样就使得在接收到用户输入的切换指令指示切换到的 目标频道包含于预设频道时, 直接获取已经缓存的目标频道的音视频信息。 这就使得在 接收到切换指令之前, 就在后台保证目标频道的节目播放处于就绪状态, 从而能够显著 提升换台速度。
优选的, 本发明实施例提供的提高换台速度的方法, 应用于机顶盒。 机顶盒中的高 频头资源用于锁频; 条件接收管理模块用于获取 CA鉴权信息以及 CA解扰; 解复用器用于 接收和过滤预设频道的咅视频信怠; 解码器用丁 ·对音视频信怠进行解码, 以输出该解码 后的音视频信息。 机顶盒的型号不同, 其包含的高频头以及解码器的个数是不同的, 例 如, 机顶盒有单高频头单解码器的机顶盒、 双高频头单解码器的机顶盒、 多高频头单解 码器机顶盒等, 其中, 多高频头可表示高频头的数量大于等于三个。
可选的, 在多高频头单解码器的机顶盒在执行换台操作时, 如图 5所示, 按照其工 作原理将换台的操作流程划分为: 锁频、解调、 首次解复用、解扰、 缓冲、 二次解复用、 解码和音视频输出。 结合上一实施例的描述, 其中, 锁频即锁定频道的频点, 通过向高 频头资源管理模块申请空闲的高频头资源来实现; 解调是在锁频之后一定会执行的操 作, 则在上述实施例中并未对此过程加以描述; 解复用对应上述获取到 PSI信息之后, 对预设频道的音视频信息进行过滤和接收的过程; 解扰即 CA解扰; 进而对解扰的音视频 信息进行缓冲; 二次解复用是将缓冲的音视频信息进行过滤, 以便于对过滤的音视频信 息进行解码, 最后将解码后的音视频信息输出即上述的音视频输出阶段。
本发明另一实施例提供了一种提高换台速度的方法, 该方法可应用于具体实例中。 本实施例以该方法应用于三高频头单解码器的机顶盒为例进行描述, 即该机顶盒可以同 时对 3个频道进行锁频, 且设当前存在 3个空闲高频头资源。 在该实例中, 当前播放的节 目是逻辑频道号 N2的节目, 其邻近频道为逻辑频道号为 N1和 N3的频道。
值得说明的是, 在本实例中, 机顶盒类型为三高频头单解码器, 则可以确定能够锁 定逻辑频道号 Nl、 N2、 N3的频点。 结合上述图 5的描述, 如图 6所示, 在本实施例中, 同 样以锁频、 解调、 首次解复用、 解扰、 缓冲、 二次解复用、 解码和音视频输出来描述换 台流程, 且每一个逻辑频道号都对应一组上述的流程, 进一步的, 当接收到的用户输入 的切换指令指示切换到 N3时, N1频道的节目停止缓冲, 并启动对逻辑频道号为 N4的节目 的缓冲, 这样在用户向上向下换台时, 都可以显著提高换台速度, 提高机顶盒的效率, 从而节省用户时间。
本发明另一实施例提供了一种提高换台速度的装置 07, 如图 7所示, 该装置包括: 获取单元 71、 接收单元 72、 输出单元 73。
获取单元 71, 用于获取预设频道的第一信息。
其中, 第一信息至少包括: 与预设频道对应的条件访问 CA鉴权信息、 成人级限制信 息、 输出端口版权控制信息中的一种, 根据实际情况还可以包其它含任意一种或几种信 息。
可选的, 预设频道指当前播放频道的邻近频道。邻近频道指与当前播放频道逻辑频 道号相邻的两个频道。
在实际应用过程中, 用户按上下键换台, 是最常使用的换台方法。 由于用户通过数 字键的换台行为是不可预测的, 也就是说, 这种情况下切换指令指示的目标频道是不确 定的, 那么为节省存储空间、 提升设备的工作效率, 不必将所有频道划为预设频道。 则 在本发明实施例中, 预设频道为邻近频道, 且邻近频道为与当前播放频道逻辑号相邻的 两个频道, 也就是说邻近频道为当前播放频道的上下键所指示的频道。
接收单元 72, 用于接收用户输入的切换指令。
其中, 切换指令指示切换到目标频道。
输出单元 73, 用于当确定目标频道包含于预设频道时, 根据接收单元 72接收的切换 指令和获取单元 71获取的第一信息, 输出目标频道的音视频, 以使得多媒体播放设备播 放目标频道的音视频。
可选的, 如图 8所示, 该装置还包括: 处理单元 74; 输出单元 73, 还包括: 选择子 单元 731。
可选的, 获取单元 71, 还用于获取预设频道的音视频信息。
处理单元 74, 用于在获取单元 71获取预设频道的第一信息之后, 对预设频道的音视 频信怠进行解扰、 缓冲处理, 还用丁 ·对获取单元 71获取到的预设频道的咅视频信怠中的 目标频道的音视频信息进行解码。
选择子单元 731, 用于选择播放的起始位置。
其中,起始位置表示:距离当前播放时间最近的,可用于解码的图像组开始的位置。 结合上述附图 1中的内容, 此处的起始位置与 T8对应的描述相同, 在此不再重复说明。
可选的, 输出单元 73, 具体用于输出处理单元 74解码后的目标频道的音视频。 本发明实施例提供的提高换台速度的装置,在接收单元接收用户输入的切换指令之 前, 获取单元获取预设频道的 CA鉴权信息、 成人级限制信息、 输出端口版权控制信息, 进而处理单元对预设频道的音视频信息进行解扰、 缓冲处理, 在接收单元接收到指示预 设频道的切换指令, 且该切换指令指示的目标频道包含于预设频道时, 处理单元对目 标频道的音视频信息进行解码, 进而输出单元输出该解码后的目标频道的音视频。 而现 有技术只能通过缩短换台过程中一小部分时间, 来提高换台速度, 本发明技术方案, 在 换台过程中, 进一步缩短了换台时间, 使得换台速度显著提高。
本发明实施例提供了一种提高换台速度的装置 08, 如图 9所示, 该装置包括:处理器 01、 存储器 02、 接收器 03、 发射器 04。
处理器 01, 用于获取预设频道的第一信息; 还用于当确定目标频道包含于预设频道 时, 根据第一信息和接收器 03接收到的切换指令, 输出目标频道的音视频。
存储器 02,用于存储处理器 01获取到的预设频道的第一信息、 接收器 03接收到的切 换指令以及待输出的目标频道的音视频。
可选的, 第一信息至少包括: 与预设频道对应的条件访问 CA鉴权信息、 成人级限制 信息、输出端口版权控制信息中的一种,根据实际情况还可以包含任意一种或几种信息。 预设频道指当前播放频道的邻近频道。邻近频道指与当前播放频道逻辑频道号相邻的两 个频道。
可选的, 处理器 01, 还用于获取预设频道; 判断预设频道所在的频点是否被锁定; 当频点未被锁定时申请空闲的高频头资源; 当获取到空闲的高频头资源或者预设频道所 在的频点被锁定时, 获取预设频道的 PSI ; 过滤预设频道节目的音视频信息; 为预设频 道的节目申请 CA鉴权操作, 获取 CA鉴权信息; 当 CA鉴权成功时, 判断待缓冲的预设频道 的节目是否被成人级限制; 当确定预设频道的节目受成人级限制时, 获取成人级限制信 息; 当确定不受成人级限制时判断预设频道输出端口版权是否被控制, 当确定输出端口 的版权受控制时, 获取输出端口版权控制信息。
处理器 01, 还用于获取预设频道的音视频信息, 并在获取到预设频道的第一信息之 后, 根据该第一信息对预设频道的音视频信息进行解扰、 缓冲。
存储器 02, 用于存储预设频道的逻辑频道号、 预设频道的音视频信息; 空闲的高频 头资源; 预设频道的 PSI ; 预设频道节目的音视频信息; CA鉴权信息; 成人级限制信息; 输出端口版权控制信息。
接收器 03, 用于接收用户输入的切换指令。
其中, 切换指令指示切换到目标频道。
可选的, 处理器 01, 还用于在获取到预设频道的第一信息之后, 且在预设频道输出 口的版权不被控制时, 对预设频道的音视频信息进行解扰、 缓冲处理; 在接收器 03接收 到切换指令之后, 判断目标频道是否包含于预设频道, 并在确定目标频道包含于预设频 道时, 根据切换指令和第一信息, 播放音视频; 还用于选择播放的起始位置。
其中,起始位置表示:距离当前播放时间最近的,可用于解码的图像组开始的位置。 具体的, 处理器 01, 还用于判断是否有 CA鉴权错误发生; 当确定不存在 CA鉴权错误 或在待 CA鉴权错误解除后判断预设频道节目是否受成人级限制; 当确定受成人级限制 时, 提示用户输入密码, 用户输入正确的密码后获取缓存的音视频信息; 判断输出端口 版权是否被控制, 当确定输出端口版权不受控制或者输出端口版权控制解除后, 对获取 的解扰后的音视频信息解码输出, 进入播放状态。
发射器 04, 用于向用户界面发送 CA鉴权错误信息、 成人级受限信息; 向多媒体播放 设备发送处理器 01解码后的目标频道的音视频。
接收器 03, 还用于接收用户根据处理器 01提示输入的密码。
可选的, 存储器 02, 用于存储处理器 01解扰后的音视频信息; 接收器 03接收到的用 户输入的切换指令; 选择播放的起始位置; 用户输入的密码。
本发明实施例提供的提高换台速度的装置, 处理器获取预设频道的 CA鉴权信息、 成 人级限制信息、 输出端口版权控制信息, 并对预设频道的音视频信息进行解扰、 缓冲处 理, 在接收器接收到指示预设频道的切换指令, 且确定该切换指令指示的目标频道包含 于预设频道时, 处理器根据第一信息, 对目标频道的音视频信息进行解码, 并由发射器 将该解码后的音视频信息发送给多媒体播放设备。而现有技术只能通过缩短换台过程中 —小部分时间, 来提高换台速度, 本发明技术方案, 在换台过程中, 进一步缩短了换台 时间, 使得换台速度显著提高。
本发明实施例还提供了一种提高换台速度的系统, 如图 10所示, 该系统包括提高 换台速度的装置 07、 多媒体播放设备 01或者提高换台速度的装置 08、 多媒体播放设备 01。
图 10以提高换台速度的装置 07、对媒体播放设备 01组成的提高换台速度的系统为 例, 由于提高换台速度的装置 08、 多媒体播放设备 01组成的提高换台速度的系统与图
10描述的系统构造相同, 此处不再进行附图描述。
其中, 提高换台速度的装置 07包括上述单元 71至 74; 提高换台速度的装置 08, 包括上市处理器 01、 存储器 02、 接收器 03、 发射器 04; 多媒体播放设备 01用于接收 提高换台速度的装置输出的目标频道的音视频, 并播放该音视频。 可选的, 该多媒体播 放设备 01包括但不限定为手机、 平板电脑、 笔记本电脑等。
通过以上的实施方式的描述,所属领域的技术人员可以清楚地了解到本发明可借助 软件加必需的通用硬件的方式来实现, 当然也可以通过硬件, 但很多情况下前者是更佳 的实施方式。 基于这样的理解, 本发明的技术方案本质上或者说对现有技术做出贡献的 部分可以以软件产品的形式体现出来, 该计算机软件产品存储在可读取的存储介质中, 如计算机的软盘, 硬盘或光盘等, 包括若干指令用以使得一台计算机设备(可以是个人 计算机, 服务器, 或者网络设备等) 执行本发明各个实施例所述的方法。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不局限于此, 任何 熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易想到变化或替换, 都应 涵盖在本发明的保护范围之内。 因此, 本发明的保护范围应以所述权利要求的保护范围 为准。

Claims

权利要求
1、 一种提高换台速度的方法, 其特征在于, 包括:
获取预设频道的第一信息;
其中, 所述第一信息至少包括: 与所述预设频道对应的条件访问 CA鉴权信息、 成 人级限制信息、 输出端口版权控制信息中的一种;
接收用户输入的切换指令, 所述切换指令指示切换到目标频道;
当确定所述目标频道包含于所述预设频道时, 根据所述切换指令和所述第一信息, 输出所述目标频道的音视频, 以使得多媒体播放设备播放所述目标频道的音视频。
2、 根据权利要求 1所述的提高换台速度的方法, 其特征在于, 所述预设频道包括 当前播放频道的邻近频道。
3、 根据权利要求 2所述的提高换台速度的方法, 其特征在于, 所述方法还包括: 获取所述预设频道的音视频信息;
在获取所述预设频道的第一信息之后, 对所述预设频道的音视频信息进行解扰、 缓 冲处理。
4、 根据权利要求 3所述的提高换台速度的方法, 其特征在于, 还包括: 选择播放的起始位置, 所述起始位置表示: 距离当前播放时间最近的, 可用于解码 的图像组开始的位置。
5、 根据权利要求 4所述的提高换台速度的方法, 其特征在于, 还包括: 对目标频道的音视频信息进行解码, 并输出解码后的所述目标频道的音视频。
6、 一种提高换台速度的装置, 其特征在于, 包括:
获取单元, 用于获取预设频道的第一信息;
其中, 所述第一信息至少包括: 与所述预设频道对应的条件访问 CA鉴权信息、 成 人级限制信息、 输出端口版权控制信息中的一种;
接收单元, 用于接收用户输入的切换指令, 所述切换指令指示切换到目标频道; 输出单元, 用于当确定所述目标频道包含于所述预设频道时, 根据所述接收单元接 收的所述切换指令和所述获取单元获取的所述第一信息, 输出所述目标频道的音视频, 以使得多媒体播放设备播放所述目标频道的音视频。
7、 根据权利要求 6所述的装置, 其特征在于, 所述预设频道包括当前播放频道的 邻近频道。
8、 根据权利要求 7所述的装置, 其特征在于, 所述装置还包括:
所述获取单元, 还用于获取所述预设频道的音视频信息;
处理单元, 用于在所述获取单元获取所述预设频道的第一信息之后, 对所述预设频 道的音视频信息进行解扰、 缓冲处理。
9、 根据权利要求 8所述的装置, 其特征在于, 所述输出单元, 包括:
选择子单元, 用于选择播放的起始位置, 所述起始位置表示: 距离当前播放时间最 近的, 可用于解码的图像组开始的位置。
10、 根据权利要求 9所述的装置, 其特征在于, 还包括:
所述处理单元,还用于对所述获取单元获取到的预设频道的音视频信息中的目标频 道的音视频信息进行解码;
所述输出单元, 具体用于输出所述处理单元解码后的所述目标频道的音视频。
11、 一种提高换台速度的系统, 其特征在于, 所述系统包括如上述权利要求 6至 10 任意一项所述的提高换台速度的装置以及多媒体播放设备,所述多媒体播放设备用于播 放所述提高换台速度的装置输出的音视频。
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